SECAM - definition. What is SECAM
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FRENCH ANALOG COLOR TELEVISION SYSTEM
Sequentiel Couleur avec Mémoire; Séquentiel couleur à mémoire; Séquentiel couleur avec mémoire; Secam; SÉCAM; Mesecam; MESECAM; Sequentiel Couleur avec Memoire; Sequentiel couleur avec memoire; Sequentiel couleur a memoire
  • Spectrum of a SECAM broadcast, with colour (red) and sound (green, yellow) sub-carrier frequencies

SECAM         
SEquentiel Couleur Avec Memoire
576i         
  • Interlaced scanning: display of odd (green) and even (red) scanlines, and line return blanking periods (dotted)
STANDARD-DEFINITION VIDEO MODE
PAL speedup; 576i50; PAL/SECAM; 582i; 576i50 16:9
576i is a standard-definition digital video mode, originally used for digitizing analog television in most countries of the world where the utility frequency for electric power distribution is 50 Hz. Because of its close association with the legacy color encoding systems, it is often referred to as PAL, PAL/SECAM or SECAM when compared to its 60 Hz (typically, see PAL-M) NTSC-colour-encoded counterpart, 480i.
Analog high-definition television system         
  •  HD-MAC test pattern similar to the B-MAC test pattern
ANALOG VIDEO BROADCAST TELEVISION SYSTEM
Analogue High-definition television systems; Analogue high-definition television systems; Analog high-definition television systems; Analog HDTV; 737i; SECAM 819 lines
Analog high-definition television has referred to a variety of analog video broadcast television systems with various display resolutions throughout history.

ويكيبيديا

SECAM

SECAM, also written SÉCAM (French pronunciation: ​[sekam], Séquentiel de couleur à mémoire, French for color sequential with memory), is an analog color television system that was used in France, some parts of Europe and Africa, and Russia. It was one of three major analog color television standards, the others being PAL and NTSC. This page primarily discusses the SECAM colour encoding system. The articles on broadcast television systems and analog television further describe frame rates, image resolution, and audio modulation. SECAM video is composite video because the luminance (luma, monochrome image) and chrominance (chroma, color applied to the monochrome image) are transmitted together as one signal.

All the countries using SECAM are currently in the process of conversion, or have already converted to Digital Video Broadcasting (DVB), the new pan-European standard for digital television. SECAM remained a major standard into the 2000s.